From 3cb5ad152b54430f3e5f338c15f8cd434e7160c8 Mon Sep 17 00:00:00 2001
From: Jaegeuk Kim <jaegeuk.kim@samsung.com>
Date: Tue, 18 Mar 2014 13:29:07 +0900
Subject: [PATCH] f2fs: call f2fs_wait_on_page_writeback instead of native
 function

If a page is on writeback, f2fs can face with deadlock due to under writepages.
This is caused by merging IOs inside f2fs, so if it comes to detect, let's throw
merged IOs, which is implemented by f2fs_wait_on_page_writeback.

Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
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